Wiper ring mountings for hot tops



April 17, 1956 H. A. WHITE, JR

WIPER RING MOUNTINGS FOR HOT TOPS Filed April 25, 1954 HERBERT A. WHITE,JR.

dleag.. @ja f United States Pate'nt 0 WIPER RING MOUNTINGS FOR HOT TOPSHerbert A. White, Jr., Pittsburgh, Pa.

Application April 23, 1954, Serial No. 425,231

3 Claims. (Cl. 22-147) This invention relates to new and usefulimprovements in replaceable refractory rings employed with permanent hottops of the so-called oating type, and it is among the objects thereofto provide a refractory lining ring with clips for positioning andclamping wiper strips that are located between the permanent hot topcasing and the refractory lining ring, it being among the objects of theinvention to provide means for quickly and accurately inserting thesheet metal wiper rings that function to close the joint between the hottop casing and the ingot mold walls.

Wiper strips for ingot mold hot tops have heretofore been insertedbetween the hot top and the refractory lining ring by providing recessesor notches in the refractory ring in which upstruck or offset portionsof the wiper ring were inserted to properly locate the rings withrespect to the periphery of the hot top casing. The necessity foraligning the offset tabs of the wiper ring with the recesses of therefractory lining ring required adjustments and fitting and oftenresulted in misalignment of the rings, which are lusually constituted ofsegments that are assembled when the liner ring is secured to the hottop casing.

By means of the present invention clamps are provided on the lining ringwhich extend to the periphery of the hot top casing and provide anexpedient manner of inserting the wiper ring therebetween, the springmembers being so located on the ring as to accurately space the wiperring around the periphery of the hot top.

The invention will become more apparent from a consideration of theaccompanying drawing, constituting a part hereof, in which likereference characters designate like parts, and in which- Figure 1 is avertical cross-sectional view, partially in elevation of a hot topstructure embodying the principles of this invention;

Figure 2 is a top plan view of a refractory ring employed as a linerbeneath the hot top casing;

Figure 3 is an enlarged detail in cross section showing a portion of thehot top and the lining ring and showing the attaching clips and wiperring clamps in elevation;

Figure 4 is a top plan view of a segment of a wiper ring; and

Figure 5 is a vertical section of a fragment of a lining nng.

With reference to the several gures of the drawing, the numeral 1designates a permanent hot top casing having trunnions 2 by which it issuspended when placed over an ingot mold, not shown. Casing 1 is linedwith refractory brick 3 that are supported on a ange 4 of the casing 1.The liner 3 is renewable from time to time but need not be renewed foreach use of the hot top when the metal is cast in the ingot.

A refractory liner 5 in the shape of a ring, as shown in Figure 2, isprovided for the bottom of the casing 1 and is destroyed with everycast. This ring is replaced between castings and is attached to thecasing by means of a clip 6 that is fitted into ridges or holes in thecasing 1 on one end and has a folded or beaded portion 7 that snaps overa shoulder or ridge 8 on the inside of the ring 5, there being four ofsuch clips employed with the ring 5 which has four recessed portions 8as shown in Figure 2. Ring 5 has a flange portion of substantially thedimension of the lower end of the casing 1 which is spaced therefromwhen the bottom ring 5 abuts the lining 3.

Disposed in the space between the bottom ring 5 and the casing 1 is asheet metal wiper strip 9 which, as shown in Figure 4, is in segmentshaped sections to facilitate assembly between the ring 5 and moldcasing 1. In accordance with the present invention the wiper strip orring 9 is secured in position by means of spring clamps 10 that arepreferably integrally formed with the bottom ring 5 in angularly spacedrelation as shown in Figure 2, to form a space for receiving the wiperring. The free end of the spring tip 10 may be slightly llared, asshown, to make it convenient to slip the inner face portion 11 of thewiper ring underneath the clip with the ared portion 12 of the ringextending upward as shown.

By means of the clips 10 which have a shank portion embedded in the ring5, the wiper strips are inserted in position with the flared portion 12properly spaced concentric With the ring 5 and the hot top casing 1 sothat when the hot top is lowered in the ingot mold the flared portion 12of the wiper strip will contact the inner wall of the ingot mold toprovide an clfective seal. As shown in Figures 2 and 5, the clip 10 liesin a V-shaped recess lila slightly below the face of the flange ofbottom ring 5 to provide a bite for firmly gripping the wiper strip 9.

When the metal is poured in the ingot through the hot top from a ladlesuspended above, it will rise in the ingot mold and in the hot top toprovide excess metal above the ingot mold for feeding the center of theingot as the metal solidies in the mold to avoid the formation ofpiping. As the metal rises and envelops the Wiper strip 12 it willfreeze to form a seal, thus preventing the metal from running outbetween the hot top and the ingot mold. When the ingot is cast the moldis removed, the ring S being broken in this operation, or it may beretained on the croppage or scrap portion of the ingot from which it issubsequently removed. If it adheres to the hot top casing 1, it isreadily removed therefrom and replaced by a new ring with new wiperstrips.

It is evident from the foregoing description of the f invention that theuse of the spring clamps 1h for anchoring the wiper strips eliminatesthe need for shaping the replaceable portions of bottom ring 5 toreceive offset or struck out portions in the wiper strip. Also by meansof the spring clips, which are readily provided in any numbers beingrelatively inexpensive, the wiper strip is more firmly held and moreaccurately placed when inserted between the ring 5 and the hot topcasing 1.

Although one embodiment of the invention has been herein illustrated anddescribed, it will be evident to those skilled in the art that variousmodifications may be made in the details of construction withoutdeparting from the principles herein set forth.

l claim:

l. In a hot top for ingot molds, a casing having refractory lining andan attachable bottom ring of refractory material attached thereto, saidring having a flange portion spaced from the bottom of the casing andhaving A integrally formed metal clips with a leg extending into thebody of the ring and a clamping portion overlying the flange face, andsheet metal wiper strips inserted between said clips and ange faces.

2. In a hot top for ingot molds, a casing having refractory lining andan attachable bottom ring of refractory material attached thereto, saidring having a flange portion spaced from the bottom of the casing andhaving a plurality of angularly spaced metal clips with a leg extendinginto the body of the ring and a clamping portion overlyv 3 v 4 ing theRange face, and sheet' metal Wiper strips inserted clamping portion toprovide a bite, vand sheet metal wiper between saidclips and fla-ngefaces Withtheinner edges strips inserted' between said clips and 'ang'e"faces with of the strips abutting the legs ofthe clips. the inner edgesof the strips abutting the legs of the clips.

3. In a hot to for ingot molds, a casing having refractoryA liningl andm'- attachable bottom ring of refractory.` 5 References Cited m the meof uns patent material attached thereto, said-ring-havng aange'portionUNITED STATES PATENTS spaced from thebottom of the' casng'andihazying aplural- 1,949,292 Charman et al Feb. 27, 1934 ity'of angularly spacedmetal clips witha leg extending 2,088,288 Charman July 27, 1937 intothebody of theV nng and a' clamping portion: overlying 2,258,483 Chaman-10-, Ot..71, 1941 the ange face,V the-flange face beingrecessedvbel'ow'tl'ie` 10 2,287,772 Anthony June 30, 1942

1. IN A HOT TOP FOR INGOT MOLDS, A CASING HAVING REFRACTORY LINING ANDAN ATTACHABLE BOTTOM RING OF REFACTORY MATERIAL ATTACHED THERETO, SAIDRING HAVING A FLANGE PORTION SPACED FROM THE BOTTOM OF THE CASING ANDHAVING INTEGRALLY FORMED METAL CLIPS WITH A LEG EXTENDING INTO THE BODYOF THE RING AND A CLAMPING PORTION OVERLYING THE FLANGE FACE, AND SHEETMETAL WIPER STRIPS INSERTED BETWEEN SAID CLIPS AND FLANGE FACES.